<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>修改商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
       <el-alert title="修改商品信息" type="info" center show-icon :closable="false"></el-alert>
       <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form :model="editGoodsForm" :rules="editGoodsFormRules" ref="editGoodsFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="handleTabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="editGoodsForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model.number="editGoodsForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model.number="editGoodsForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model.number="editGoodsForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="editGoodsForm.goods_cat" :options="catList" :props="catListProps" clearable></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="editGoodsForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnEdit" @click="editGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="perviewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      catList: [],
      activeIndex: '0',
      editGoodsForm: {},
      catListProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      editGoodsFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
          { type: 'number', message: '年龄必须为数字值' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
          { type: 'number', message: '年龄必须为数字值' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
          { type: 'number', message: '年龄必须为数字值' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: { Authorization: window.sessionStorage.getItem('token') },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCatList()
    this.getGoodsById(this.$route.query.id)
  },
  methods: {
    async getGoodsById(id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      res.data.goods_cat = res.data.goods_cat ? res.data.goods_cat.split(',') : []
      this.editGoodsForm = res.data

      console.log(this.editGoodsForm)
    },
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.catList = res.data
    },
    async beforeTabLeave(activeName, oldActiveName) {
      // if (this.editGoodsForm.goods_cat.length === 0) {
      //   this.$message.error('请先完成商品基本信息')
      //   return false
      // }
      return await this.$refs.editGoodsFormRef.validate()
    },
    async handleTabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.catId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.catId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        this.onlyTableData = res.data
      }
    },
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.editGoodsForm.findIndex(item => item.pic === filePath)
      this.editGoodsForm.pics.splice(i, 1)
    },
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.editGoodsForm.pics.push(picInfo)
    },
    editGoods() {
      this.$refs.editGoodsFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请完整商品信息！')
        }
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.editGoodsForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.editGoodsForm.attrs.push(newInfo)
        })
        const form = _.cloneDeep(this.editGoodsForm)
        form.goods_cat = form.goods_cat.join(',')
        form.goods_price = form.goods_price - 0
        form.goods_weight = form.goods_weight - 0
        form.goods_number = form.goods_number - 0

        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    catId() {
      if (this.editGoodsForm.goods_cat.length === 3) {
        return this.editGoodsForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-checkbox {
    margin: 0 5px 0 0 !important;
  }

  .perviewImg {
    width: 100%;
  }

  .btnEdit {
    margin-top: 15px;
  }
</style>
